Power-hammer.



L. PIERCE.

I POWER HAMMER.

APPLICATION FILED AUG.1l| I9I5.

Patented Nov. 2, 1915.

en tor T Att zs a Pa r nnolvrrnncnor new 101m, N. Y.

To all whom concern: Be it known that 1, LEON PIERCE,

v e A r a citizen of the United States, and a resident of New Yorkjcity,county and State of New York,

have invented certain new and useful Improvements in Power-Hammers, ofwhich the following is a specification.

i This invention relates to poier hammers and the objects of theinvention are to construct a power hammerfor driving fpiles or the linethat is nearly noiseless in operation.

Tothe accomplishment of the above objectsand to such others as mayhereinafter appear the invention comprises an inclosed hammer arrangedto be mounted upon the upper end of a pile to be. driven and pro-'vi'ded withmeansfor confiningwater or the like adjacent to the top ofthe pile through theZmedium' of which the. striking head of thehammeroperates to drive the pile, thereby deadening the sound incident to thedriving of piles when the striking head comes into direct contact withthe pile or anvil plate. l

; drawings, and will thenpoint out I willnow proceed to describe myinvention with reference to the accompanying the novel featuresinfclaims. V i e Insaid drawingszFigure 1 is a side view partly insection of a hammer made in ac- Fig. 2 is a perspective view of thehammer shown in Fig. 1, with partsbroken away. Fig. 3 is a transversesectional view taken on the line 3-3 of 1. Fig. 4 isa detail'sectionalview of the hammer head and dolly plate in strikingposition. i

In the drawings, 1 deslgnates the hammer frame which is provided in thepresent'in stance, on its side edges with vertical ribs 2 Twhich formchannels or guideways for the reception of the guide bars of the usualT'tower orother support in which this type of hammer is usually mounted.

' The upper end ofthe frame 1 is open and suitably supports a heavy topor cap .3 se-i curely bolted to the top of the frame.

*Formed integral with the cap 3 is a central i 'this rod is secured apiston 55. Mounted on this piston and piston rod is a vert1callydepending post 4 which serves as, a rigid immovable piston rod. To thelower end of reciprocating cylinder 6 having a head 7 screwed thereonand provided with a stufiing "box 8. The lOWGIf'GIlCl of the: cylinderis formed with a; suitable hammer head POWER-HAMMER.

Specification of Letters Patent. Patented Ngv, 2, 1915 Application filedAugust 11, 1915. Serial No. 44,879. i

The cylinder is formed atjits sides with vertical grooves 10 which fitcorresponding guides 11 in the hammer frame, said guides preventing anyrotation of the cylinder in the frame.

The top or cap 3 is provided, in the pres,

longitudinally extending passages 15 and,

16 in the rigid piston rod 4. The passage 15 extends from the valvecasing through the piston rod, opening into the cylinder below thepiston, while the passage 16 extends from the valve casing through thepiston rod, opening into the cylinderabove the pis ton, as clearly shownin the drawings.

The valve 13 is operated through the medium of a valve stem 17 shown indotted lines, which is pivotally connected to a link 18, the oppositeends of which arepivotally 1 connected to the upper ends of valveoperating levers 19 and 20, said levers being pivoted in the main frameat 21 and 22.

Formed on opposite sides of the cylinder are.

beveled cams 23 and 2 1, the cam 24: being formed near the upper end ofthe cylinder and having a suitable cam surfaceinclining inwardly anddownwardly, while the cam 23 is near the lower end of the cylinder andis formed with a cam surface which inclines inwardly and upwardly. Thecam 24 is adapted to engage the roller 25 of the valve operating lever20 as the cylinder completes its downward movement; and the cam 23 isadapted to engage the roller 26 of the valve operating lever 19 as thecylinder completes its upward movement. It is manifest, therefore, thatas the cylinder completes its downward movement, the position shown inFig.

1, the valve 13 will be operated to admit steam to the passage 16 toraise the cylinder, and when the cylinder completes its upward movementthe valve 13 will be again operated so as to admit steam to the passage.

15 to force the cylinder down. The exhaust steam from either side ofthepiston passing out through suitable ports 27 and 28 into the exhaustpipe 29, which extendsthrough 30 being closed by means of a dolly-plateor anvil plate 31 held in a suitably enlarged recess 32 in the frame, asshown in Fig. 4:.

The dolly plate 31 is inserted into p osition through a suitable sideopening in the frame. a :whieh is closed by means shown in Fig. 2.

The lower end of the haniiner frai'ne is 'r'eleather fen-utter 3'9thetop edge of which engagesithe outer surfaces of the anvilpipe35.51116 sides or the hammer frame near the bottom ar'e'reces'sedandthese recesses are covered by, means or suitable plates 40. r

open sideportions of the frame that inclose u ee hnjder 6 are closed bymea'ilfs of suitable covers e1, ."rferab1 made hollow and pro vided witcorrugated 'pieeesof 3 to deaden the sound made the 'hagnrnen,

. Erom the above description it will be seen the exhaust steam as itleaves the 'haustports27 and 28 lpasses outthroiigh the -35. exhaustpipe into the inclo'sed surrounding the v hammer v'vliic efietitively rnuflles the sound. of the eiiliaus't "steam,

which allowed to ip'a'ss out through the .pipelQ orthrouh the openings43through 46 which the valve evers 19 and 20 The exhaust, mam s,itco'nde'n s in the ,H.,,\1 n;f .,/...2',.l.. lnclosedcas ng runs downinto the hainmer hole 30"offthefi'ame and collectsiipon the to'p of thedollyplate Bl so h s to (leader) the 591 1191 0fbh 5 -b;lOly as thehammer head 9 st ikes t ei l llm e h 3. 6% W r ;retained below the dollyplate iiiea'ns oijthe;cylindrieal strip 39 before desalted.

- Jin; Eig. Fl is shown th e gpjositien of the hamfnier head Q-inrelation to the layer ofwa'ter nd l' lle al lly p lztte is the hamm rhead strikes, after which the hammer ifi'aiiie iifses s l lyiasshown; nF -s 1 w the 9 3 1 f h 'blbimithe ra 013' the am e kind tlihilflyel of;Water on thedolly platefa'ss'uming-the position shown in Fig. 4E b efo'r'ethe *fi xtblowf b f kt Y Ata'p t ljis provided iframeltojpi'e WaneWa sin-e' bb h g 1' r 1 From ;-the. above description it will be seenthat me'ans a fe {provided forfl ihtilliing the exhaust steam used in drivin gfthe ham- '-mer,f;by disch-largin-gthe sameon the inside of theframe 'surrounding the 'opefating part's of the hammer which have beenin closed this P p The means "pm.

of a plate 33,

vided for muflling the exhaust do not take up any additional room so asto enlarge the space ocupiedby the hammer or impair its efliciency 1nany manner.

From the above descriptlon it will also-be provides a continuous supplyof water whleh 1s cohfined in the hammer hole on: top

ofthe dolly plateso as to deaden the sound of the hammer, "the excesswater being confine'd belowv the" dolly plate as before decribed U 1 v rI I An ordinary steam hammer used in driving piles makes a greatdealibf'nbise and where it is necessary to drive piles next to largebuildings, the* tenants are putto a great deal of inconvenience ali'danney 'nee',

that often necessitate their vacating the buildings in the near vicinityof the ham me'r'. V

A steam hammer made "as above described 7 seen that as the exhaust steamcondenses it v noise made by the hammer in pounding is s alsoeffectively silenced.

mounted on top of the pipe pile 51 "The In thelpreseht instance theanvil pipe 35. is mounted upon a driving'he'ad 5i) whichis' driving head50, made the subject 7 matter of a co-pendmg appl cation no Clflljll,

fliaving been in application.

Whfle {the invent'on been described with particular referenceto thedetailsfOf construction the same is not to be considered as limitedthereto, as inanychanges can-be: j f

ma e "and still. al within the scope Grebe invention set torth in thefollowing claims. 7

I 11a r 1. Apower hammer comprising in'com binati'oh a hammer frame,reciprocating. hammer mounted in said frame, steam- 0p "erated meansrerreciprocating said'ham hier, fiheans 'ffor incl'o'sing said hammer insaidnme, and means for-discharging the jenfhai ist steam used inoperating the ham-1 jhieron the Inside of the hammer frame :to'

muflie the sound of the {exhaust Z A "power hammer compris ng in combination' V a "hammer frame having a haminer ho'le, a reciprocatinghammer, mounted in said frame and arranged to" engage said immmer hole ado'll-y plate supported in said frahrie below said "hammer hole, saiddollyplate being arranged to retain water in "said hammer hol fordeadening the plate.

jsoiintl of the hammer againt said dolly power hammer eomprisin incomlupnimerfihole, a dolly :plate supported in said frame below saidhammer hole, said dolly plate being arranged 'to-"r t ainwater in hammerhole T61 deadening the sound of the hammer against said dolly binationa'ham'mer name hav'ilfg a hannner hole, reciprocatmg hamme'r mount d 111plate, and means for supplying water to said hammer hole and means forretaining said water at a certain level in said hole.

4:. A power hammer comprising in combination a hammer frame having ahammer hole, a reciprocating hammer mounted in said frame and arrangedto engage said hammer hole, a dolly plate supported in said frame andarrangedto close the bottom of said hammer hole, steam operated meansfor reciprocating said hammer, means for inclosing said hammer in saidframe, and means for discharging the exhaust steam used in operating thehammer on the inside of the hammer frame to mufiile the sound of theexhaust and confine the condensed water in said hammer hole above saiddolly plate to deaden the sound of the hammer.

Intestimony whereof I have signed this specification in the presence oftwo subscrib- Copies of this patent may be obtained for five cents each,by addressing the "Commissioner of Patents, Washington, D. C.

